Method of making sulphate pulp

Details Method of making sulphate pulp Method of making sulphate pulp

D - Textiles, Paper

21

C

9/17

D21C 3/02 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1203055

Abstract of the Disclosure The invention relates to a modified batch cooking technique for the making of sulphate pulp with high delignification degree or with normal delignification degree with increased pulp viscosity. According to the invention, this is effected by one or several displacements of the liquor in the digester with liquor of the same temperature as the cooking liquor but with a lower lignin content. Economies in sulphate pulp production are achieved by practising our novel process.

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